Francisco de Ascensão Mendonça

Irvingiaceae is a small family of flowering plants, consisting of about 13 species; it was erected by Exell and Mendonça in 1951. The family and type genus were named after the Scottish naval surgeon, Edward George Irving.

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Narcissus calcicola is a species of narcissus (daffodils) in the family Amaryllidaceae. It is classified in Section Apodanthi. It is endemic to Portugal.

Pinacopodium is a genus of flowering plants belonging to the family Erythroxylaceae. Its native range is Western Central Tropical Africa. Species: Pinacopodium congolense (S.Moore) Exell & Mendonça Pinacopodium gabonense (Cavaco & Normand) Normand & Cavaco

Diogoa is a genus of flowering plants belonging to the family Olacaceae. Its native range is Western Central Tropical Africa; found in Cameroon, Congo, Gabon, Nigeria and Zaïre. The genus name is in honour of Diogo Cão (c. 1450 – c. 1486), a Portuguese explorer. Known species: Diogoa retivenia (S.Moore) Breteler Diogoa zenkeri (Engl.) Exell & Mendonça

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Felicia mossamedensis or yellow felicia is a well-branched, roughly hairy, annual or perennial plant of up to 30 cm (1 ft) high, assigned to the family Asteraceae. It has alternately arranged, seated, flat to slightly succulent, broad-based, entire, blunt tipped leaves. The flower heads sit individually on top of a stalk of up to 8 cm (3 in) long, have an involucre of three whorls of bracts, many yellow ray florets and many yellow disk florets. It can be found in southern Africa, in Zimbabwe, Mozambique, Botswana, Eswatini, South Africa and on the coast of Angola.

Dialytheca is a monotypic genus of flowering plants belonging to the family Menispermaceae. The only species is Dialytheca gossweileri. Its native range is Western Central Tropical Africa.

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